The Panzerbike is a German-built motorcycle with the engine of a T-55 tank inside. That's a diesel V12 with 620 HP. The bike is 19 feet long, 9 feet wide, and weighs nearly 5 tons. Actually, it's more like a tractor than a motorcycle, since the sidecar is built-in and it takes two people to steer. Still, Tilo Niebel and his friends at the Harzer Bike company created quite an impressive piece of machinery.